wsattr.__set__() catchs TypeError

On Python 3, comparison between string (str) and integer (int) raises
a TypeError exception. I suggest to catch it to raise an InvalidInput
exception, as we already do for ValueError.

In practice, the TypeError was seen in OpenStack Cue tests on
Python 3, in a test passing a string to an attribute expecting an
integer, attribute having a minimum set (to an integer too).

Change-Id: I74103330ccb5cdc26aa3508fcefcc34310e00c27

wsme/tests/test_types.py

@@ -206,6 +206,19 @@ Value: 'v3'. Value should be one of: v., v.",
         self.assertRaises(exc.InvalidInput, setattr, obj, 'alist', 12)
         self.assertRaises(exc.InvalidInput, setattr, obj, 'alist', [2, 'a'])
 
+    def test_attribute_validation_minimum(self):
+        class ATypeInt(object):
+            attr = types.IntegerType(minimum=1, maximum=5)
+
+        types.register_type(ATypeInt)
+
+        obj = ATypeInt()
+        obj.attr = 2
+
+        # comparison between 'zero' value and intger minimum (1) raises a
+        # TypeError which must be wrapped into an InvalidInput exception
+        self.assertRaises(exc.InvalidInput, setattr, obj, 'attr', 'zero')
+
     def test_text_attribute_conversion(self):
         class SType(object):
             atext = types.text

wsme/types.py

@@ -487,7 +487,7 @@ class wsattr(object):
     def __set__(self, instance, value):
         try:
             value = validate_value(self.datatype, value)
-        except ValueError as e:
+        except (ValueError, TypeError) as e:
             raise exc.InvalidInput(self.name, value, six.text_type(e))
         dataholder = self._get_dataholder(instance)
         if value is Unset: